Buy Nothing Day is a day of protest against consumerism. In North America, the United Kingdom, Finland and Sweden, Buy Nothing Day is held the day after U.S. Thanksgiving, concurrent with Black Friday; elsewhere, it is held the following day, which is the last Saturday in November.

Anti-consumerism is a sociopolitical ideology that is opposed to consumerism, the continual buying and consuming of material possessions. Anti-consumerism is concerned with the private actions of business corporations in pursuit of financial and economic goals at the expense of the public welfare, especially in matters of environmental protection, social stratification, and ethics in the governing of a society. In politics, anti-consumerism overlaps with environmental activism, anti-globalization, and animal-rights activism; moreover, a conceptual variation of anti-consumerism is post-consumerism, living in a material way that transcends consumerism.